Windows System Error Code 8566 – ERROR_DS_DOMAIN_VERSION_TOO_LOW (0x2176)]

In this post, you’ll learn about the Windows System Error ERROR_DS_DOMAIN_VERSION_TOO_LOW (0x2176)] and the reason why you are receiving the error message

How does this Error in Windows Look like?

Error Code 8566 ERROR_DS_DOMAIN_VERSION_TOO_LOW (0x2176)]

Why do you receive the System Error Error Code 8566 ERROR_DS_DOMAIN_VERSION_TOO_LOW (0x2176)] in Windows?

The version of the operating system installed on this server no longer supports the current domain functional level. You must raise the domain functional level before this server can become a domain controller in this domain.